Window ventilator



Sept. 7, 1937. s. s. KEMPF I WINDOW VENTILATOR Filed June 26, 1935Patented seps- ,1, x 1937 OFFICE wnvnow VENTILATOR- Steven S. Kempf,Chicago, Ill, Application June 26, 1935, Serial No. 28,542

2 Claims.

My invention relates to window screens, and my main object is to providea screen which combines the features of a ventilator, fly screen andprotector against rain and wind.

A further object of the invention is to build the novel screen in aself-contained unit of a compact nature, whereby to be easy to handle.

A still further object of the invention is to utilize the transparentproperty of glass or similar material for the ventilating feature of thescreen, so that a maximum amount oflight is admitted. v Another feature.of the invention is to construct the same along lines of utmostsimplicity, and ready adaptability to conventional window installations.

With the above objectsin view, and any others which may suggestthemselves from the description to follow, a better understanding oftheinvention may be gained by reference to the accompanying drawing, inwhichi Figure 1 is an external elevation of the novel screen;

Figure 2 is an internal elevation thereof;

Figure 3 is an enlarged fragmentalsection on 6-6 of Fig. 5.

the back or inner side of the frame instead of.

to the outer side thereof as is the usual practice.

The ventilator feature of the novel screen is disposed frontally of thenetting H in the form of'a series of oblique visor-type vanes 113 ofglass or other transparent material. These vanes occur in verticallyspaced order, and are of an angle approximately as shown in Fig. 3, sothat they overlap, whereby to permit air to enter but checkcross-drafts.

The vanes iii are of the same angle and so mounted as to maintain theirpositions permanently and be held against sliding out of the frame.Thus, the side rails of the frame Ill are grooved as indicated at lflato seat the terminal ."portions of the vanes". As noted in Fi 4, theends of the vanes converge in an outward direction, and the grooves lflaare formed to' suit, so that when the vanes have been inserted into theframe from the rear, they cannot advance beyond their proper position asindicated in Fig. 4. The vanes are thus supported and locked in positionwithout the use of a special fastening means. Fig. 4 shows that thenetting l2 and molding frame ll form a check for the recession of thevanes.

While my main embodiment employs a series of fixed ventilator vanes. itis conceivable that a modification can be designed to make the vanesfoldable or adjustable, as in Venetian blinds. Thus, a specimen of sucha modification is suggested in Figs. 5 .and 6, it being noted that thevanes are mounted between pairs of disks II, the latter having trunnionsHa journaled in the screen frame. A wire rod IS in back of the screenmakes connections l5a with each of the disks, so that when the rod islowered, the vanes swing up, and vice-versa. As mentioned, theillustration is but for purposes of example, since other methods may bedevised to put the principle in practise.

It will be seen from the above description that I have provided aself-contained screen which has several advantages. First, it utilizesthe conventional full sized fly-netting for complete pro-v tectionagainst insects. Second, it has a set of visor-like ventilator vanes topermit ventilation without drafts and imparting an attractive appearancetothe screen. Third, the ventilator vanes are transparent, and thereforepermit complete passage of light and ventilation, while ofi'ering fullprotection against the entry of rain, snow, hail or dust. Fourth, thearticle is simply built, easily handled and capable of being applied tothe conventional window installation by any of the methods now in use.When the novel screen is of greater than ordinary width, I propose torelieve the strain at the center of the ventilator vanes by inserting avertical support or brace may also extend in shorter form as a windowin- 1. A window ventilator comprising an open frame, and a set ofvisor-type vanes'mounted therein in vertically-spaced order, the vanesand frame having cooperative formations to wedge the vanes in the sidesof the frame'whenthe vanes are inserted therein 2. A window ventilatorcomprising an open frame formed with a vertically-spaced series of .1grooves on the inner side of eeeh nae piece, botu series of groovesoonvemingfmm one face of the frame to. the other, end a set ofvisor-typemes arranged to seat endwise in pairs of the grooves, the ends of thevanes being convergent to become wedged in the women.

STEVEN S. KEMP!

